reference / testing
check
A test of the verbs above it, with a name. roci run skips it; roci test runs it and says which expect did not hold.
learn double n [ give n * 2 ]check "double" [ expect double 21 is 42 expect double -1 is -2]circle at 200 150 radius (double 40)
How to write it
check "name" [ ... ]